Brake rim construction



April 12, 1932. s FAULKNER 1,853,118

BRAKE RIM CONSTRUCTION Filed Feb. 3, 1930 2 Sheets-Sheet 1 6 f 2 7] E i 1 0 0 31 o o 6 H z 4 9 1 '1 7 I. fi 03g? T 17 1 1 a 3 a, 1 1

WMW

April 12, 1932- D. s. FAULKNER 1 BRAKE RIM CONSTRUCTION Filed Feb. 3, 1930 2 Sheets-Sheet 2 Patented Apr. 12, 1932 UNITED STATES PATENT OFFICE -DAVID S. FAULKNER, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO THE NATIONAL SUPPLY COMPANY, OF DELAWARE, OF NEW YORK, N. Y., A CORPORATION OF. DELA- WARE BRAKE am CONSTRUCTION Application filed February 8, 1930. Serial No. 425,523.

This invention relates to improvements in brake rim construction such as is set forth fully in the co-pending application to David S. Faulkner and Edward Timbs, Serial No. 6. 117,322, g

232,084, filed November 9, 1927, and especially to improvements in the construction of the brake rims and means for supporting the brake rims on the flanged ends of the wind- "in drum of such drawworks.

in modern high, speed deep well drilling the drawworks are called upon to operate at higher speeds and under heavier loads. The ,brakes of the rotary drawworks must thus stop the heavier load movin at a greater speed and thus must be capab e of absorbing a greater amount of power. As the brakes of the usual drawworks are of )thefriction type, the work or power absorbed by the go brakes is converted into heat which rapidly heats the brake drum to a, temperature far .above the temperature of the winding drums, and thus causing the brake drum to expand more rapidly than the winding drum, and thereby -causing undue stress between the winding drum casting and the brake drum.

The stress caused by the difference in expansion between the winding drum and .the

rake drum causes cracking of'tli'e winding-- drum with possible total fracture which would endanger the lives of the workers as well as the destruction of the well drilling.

equipment. It is the principal object of this invention to so construct the brake drum that 85 its expansion will not stress the winding drum casting or the brake drum forging and to thus eliminate one of the many dangers of modern high speed drilling.

To enable the brake drum to continuously operate without becoming overheated, a cooling fluid is supplied to the inner surface of the brake drum. When the brake drum is not being used during the operation of the winding drum, the cooling fluid will cool the brake drum rapidly even to a temperature below the temperature of the winding drum casting.

It is a further object of this invention to construct the brake drum sothat it will be free to contract'due to the effect of the coolfiled June 21, 1926, and Serial No.;

ing fluid without stressing the winding drum casting.

It is another object of this invention to provide a resilient packing means between the brake drum, windingdrum castin and the retaining flange to seal the cooling uid withm the structure.

Another object of this invention is to provide the winding drum with a brake drum supporting flange which will be cooled by the cool ng fluid whereby the winding drum casting is maintained at a more nearly uniform temperature.

It is a further object of this invention to proyide a brake drum of cylindrical form hav ng a floating fit upon the winding drum casting and which is provided with one or. more driving keys. v

A further object of this invention is to provide a brake drum which is relatively inexpensive of manufacture and which may be easily assembled upon or removed from the winding drum. 3

It is a further object of this invention to provide a brake drum which is not bolted to the winding drum but floats thereon to allow the brake drum to expand or contract freely without stressing the winding drum casting.

Another object of this invention is to. provide a winding drumflange and the retaining ring with flanges to prevent the'brake drum parts in .case of fracture from being thrown from the drawworks.

I Other objects and advantages of this invention will be apparent from the drawings and from the following detailed description of a preferred embodiment thereof, as illustrated in the accompanying drawings, in which drawings:

Figure l'illustrates the rotary drawworks and ilIustrates a portion of the winding drum with the improved brake drum mounted in section.

Figure 2 illustrates a sectionalview substantially along the line 2-2 of Figure 1.

Figure 3 illustrates a sectional view of a portion of the winding drum and brake drum taken substantially along the line 3-3 of Figure 2.

Figure 4 isa view similar to Figure 3, but illustrates a modification thereof.

In the preferred embodiment of this invention, as illustrated in the accompanying drawings, a rotary drawworks which is described in detail in the co-pending applications already referred to, is in part as follows:

A Winding drum 1 is mounted upon a shaft 2 which in turn is suitably journaled in bearings 3, supported upon standards 4 rising from a base 5. The shaft 2 is provided with the usual driving sprockets 6 and 7 provided with driving clutches 8 and 9.

This invention isespecially directed to the improved construction of the winding drum,

brake drum and method of supporting the brake drum u on the winding drum whereby the brake rum will not strain or distort the winding drum due to expansion or contraction of the brake drum, and this con- :struction will now be described.

The winding drum 1 is preferably of a single casting of steel or other suitable metal and having a spool 1a with end flanges 1b and each end flange is provided with an annular flange 10 preferably cast integral therewith. As most clearlyillustrated in Figure 3, the annular flanges are provided with spaced machined outer faces 10 and 11 and having an annular. recessed portion 12 between the faces 10 and 11. The recessed portion 12 is provide with a plurality of openings 13. At the outer end of the annular flange 10 is an inwardly projecting flange 14 to support the retaining ring 15 and retaining ring clampingbolts 16. The-end flanges 1?) project beyond the annular flange 1a andare provided with an annular counter bore as at 17 to receive and extend over the brake drum to prevent the brake drum parts from flying from the machine in case of fracture. The annular counter-bore 17 is provided with a sec ond annular counter-bore 18 into which suitable resilient packing 19 is inserted.

Positioned transversely across the outer faces 10,.and 11 of the annular flanges 1c are one or more key-ways 20. The retaining ring 15 is provided with counter-bores 17a and 18a similar to the counter-bores 17 and 18, and the counter-bore 18a is provided with packing 1911. To further insure the retaining 'ring 15 from being parted from the annular flange 10 an annular projection 21 snugly fits over the inner end ofthe inwardly projecting flange 14, as at 22.

' a A brake drum 24 forming a simple annular ring which is easily forged and machined of suitable wear resisting material is provided with machined faces 25 and 26 to permit the brake drum 24 to be positioned upon the annular flange 1o whereat the faces 25 and 26 engage the faces 10 and 11. The brake drum 24 may be recessed as at 27 to correspond -with the recess 12 of the annular flange 10.

The retaining ring 15 when bolted to the I inwardly projecting flange 14 by means of the bolts 16 prevents the brake drum 24 from moving off of the annular flange 10. It

should be noted that the brake drum 24 is I narrower than the annular flange 10 so that even when the retaining ring 15 is tightly clampedin place, the brake drum is free to expand transversel A supply of cooling fluid is provided as by pipe 30 controlling valve 31 and discharge pipes 32 and .33. The cooling fluid enters the channel formed by the end flange 1b, in wardly projecting flange 14 and the annular flange 1c, and flows through the openings 13. into the annular opening formed by the recessed portion 12 of the flange 10 and the recessed portion 27 formed in the brake drum, the cooling fluid thus contacting the inner surface of the brake drum 24 To prevent the cooling fluid from leaking past the ends of the brake drum, the packing rings 19 and 19a are provided.

As the annular flange 1c is in continuous contact, with the cooling fluid, it is prevented from becoming over-heated and thus the winding drum is kept at a more nearly even temperature.

From the description of the brake drum and supporting structure it will be seenthat the brake drum 24 may expand or contract freely without stressing the winding drum casting and also "the brake drum may be readily replaced when worn out. Should the brake drum fracture, the fragments are locked to, the winding drum structure. thus preventing possible injuay to the workmen and to the drilling equipment. v

A modification of brake drum and supportrill,

ing structure is shown in Figure 4, wherein the brake drum 24 is provided with an additional wearing surface as at'24a; also the openings 13a through theannular flange 1c are somewhat larger and also a larger bracing web 35 is provided to strengthen the connection between the end flange 1b and annular flange 10. Y In the operative relation with the brake drums 24 are brake bands 40 having the usual brake lining 41 and operating mechanism.

Having fully described a preferred em- .bodiment of my invention, it is to be-understood that I do not wish to be limited to the exact details herein setforth which may obviously be varied without departing from the spirit of my invention as set forth in the appended claims.

I claim:

1. A brake drum mounting comprising, a supporting means, a brake drum mounted to float thereon, and resilient packing means associated with said supporting means and the edges of said drum to resiliently seal the edges of said drum with said supporting means, and means associated with said supporting means for driving said drum.

2. A brakedrum mounting comprising, a supporting means, a brake drum mounted to float thereon and to be cooled .by a cooling fluid, a resilient packing means associated with said supporting means and the edges of said drum to resiliently seal the edges of said drum with said su portin means to revent said cooling fluid rom lea 'ng theret rough, means associated with said supporting means for driving said drum.

3. A brake drum mounting comprising, a supporting means, a brake drum mounte to float thereon to permit said drum to expand or contract without developing stress within said drum or su porting means, driving means for said bra ke drum and having a resilient packing means associated with said supporting means and said drum to enable the structure formed by the supporting means and drum to retain a cooling fluid.

4. A brake drum mounting comprising, an annular supporting means having an annular recess with a plurality of opemngs, an annular brake drum mounted upon said supporting means to cover said recess, a resilient packing means associated with said supporting means and said drum, and driving means for said brake. drum.

5. A brake drum mounting comprising, an

annular supporting means having spaced brake drum supporting surfaces a recess formed between saidfsurfaces having a plurality of openings, an annular brake drum supported upon said spaced surfaces and covering saidrecess, means for retainingsaid drum upon said supporting means and arranged to permit said drum to expand or contract without developing-stress within said brake drum or sup means for said .braie drum, and resilient packing means associated with said supporting means and said drum whereby a suitable cooling fluid may be retained in the annularpassage formed by said supporting means recess and said brake drum.

6. A brake drum mounting comprising, an annular supporting means having an annular flange, a removable flange, means for securing said removable flange to said supporting means and having spaced brake drum supporting surfaces between said flanges, a recess formed between said surfaces having a plurality of o enings, an annular brake drum mounted to oat upon said supporting surfaces and between said flanges to pernnt 881d drum to expand or contract without developorting means, driving ing stress within said drum or supporting means and having driving means, a resilient packing means associated with said supporting means and said drum to seal the annular channel formed between the supporting means recess and brake drum to enable a cooling fluid to be retained therein.

7. .In a rotary drawworks, the combination of a winding drum, a plurality of brake drums mounted to float thereon to permit said drums to expand or contract without developing stresswithin said brake drums or said Winding drum, and means associated with said winding drum. for driving said brake drums, means for resiliently sealing the brake drums to said winding drum, and means for supplying a cooling fluid to said winding drum and said brake drums.

8. A brake mounting comprising, a supporting means, a brake drum mounted to float thereon to. permit said drum to expand or contract without developing stress within said brake drum or supporting means, complementary recesses formed in the supporting means and the brake rim to define a cooling fluid chamber within the brake rim, and a vent means for the cooling fluid formed in the supporting means.

9. A brake drum mounting comprising, a supporting means, a brake drum mounted to float thereon to permit said drum to expand or contract without developing stress within said brake drum or supporting means, and the supporting means being formed to provide a vented cooling fluid chamber; within said brake rim.

10. A brake drum mounting comprisin a supporting means, a brake drum mounte to I float thereon to permit said drum to expand or contract without developing stress within said brake drum or supporting means, the brake drum and supporting meansbeing formed to provide a cooling fluid chamber within said brake rim, and vent means formed through the supporting means to said chamber for permitting cooling fluid to enter and to be vented from said chamber.

11. A brake drum mounting comprisin a supporting means, a brake drum mounte to float thereon to permit said drum to expand or contract without developing stress within said brake drum or supporting means, the brake drum and supporting means being formed to provide a cooling fluid chamber within said brake rim, vent means formed through the supporting means to said chamber for permitting cooling fluid to enter and to be vented from said chamber, and means for packing the brake rim with relation to the supporting means.

Signed at Torrance California, this 28th day of January, 1930.

DAVID S. FAULKNER. 

